How to use trapz for area under curve

How do I calcuate the area under orange curve from 0-20.

The orange curve is generated by reva2.

[Matt J]

What's wrong with the way that is shown in your code?

Answer 1

[Sulaymon Eshkabilov]

The answer to your exercise is realtively simple:

IND = find(Ua2<=20);
AREA = trapz(Ua2(IND), reva2(IND));
fprintf('The area under the curve within [0, 20] m/s is:  %f \n', AREA)

Good luck

[Junzhen Liu]

Thank you so much, you made my day

[Sulaymon Eshkabilov]

You are welcome!